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Whirlpool duet sport error code F28

You guys are amazing! I repaired my fridge in a couple hours for free because of you're info on this site, the appliance repair guy wanted to replace parts that I didn't need to. THANK YOU!
Now, I hope I can find help on my Whirlpool Washer Model WFW8410SW00.
The f28 serial communication error is coming up. Do I need to take the machine apart to check if its a loose connection. thank for any help you can provide.

Yes for the F28 error code:
First, check the wiring harness connections to the MCU, the Motor, and the CCU. Make sure all the connections are tight and there are no ground wires off. Then check the connections of the CCU board within the housing.

If the wiring connections are fine then It would be a good idea to order both, as both components have been problematic for the error code F28.

Whirlpool duet sport diagrams?

I have the technician troubleshooting guide from the front panel that shows a wiring diagram, but do you know of any guides that have more step by step info for us beginner DIY's. I think I'll need a little more detail.

I fixed it. Now I feel like an idiot.
After spending lots of time trying to figure it all out, and looking for loose connections I realized there was a grounding switch on the front bottom corner.
I had the front panel off to clean out the drain. I was having a hard time getting the screws back in and I left them off. I asked my husband to put them back on (2 weeks ago) so the panel kept falling off each time it got bumped. I of coarse thought I had loosened something, cleaning it out and never noticed the stupid switch! I only had the error message some of the time (probably when the panel was on the ground) and never put 2 and 2 together.
Thanks for your help.

I had to make an account to say Thank You! Me and my wife had moved to a different household. The washer had to be moved 27 hefty steps down from the 2d floor of the building. Long story short - we had set up the washer in the new house and sure enough, code F 28 comes up... We panic, we think that we had shaken something loose and etc. Checked all the wires, checked the motor unit the cpu and disconnected and reconnected all the wiring - nothing. Then NFIRMAN's post was read and sure enough, the Front bottom panel was off - it got loose and was left off (no clue why). So, the grounding safety switch was not being engaged making the error code pop up. Put the panel back on (front and also the back one); both switches engaged and the ludicrous problem was solved. I too felt pretty idiotic not realizing this sooner, but live and learn.

Thank you guys for having the forum and helping us solve this stressful situation.

Originally Posted by nfirman

I fixed it. Now I feel like an idiot.
After spending lots of time trying to figure it all out, and looking for loose connections I realized there was a grounding switch on the front bottom corner.
I had the front panel off to clean out the drain. I was having a hard time getting the screws back in and I left them off. I asked my husband to put them back on (2 weeks ago) so the panel kept falling off each time it got bumped. I of coarse thought I had loosened something, cleaning it out and never noticed the stupid switch! I only had the error message some of the time (probably when the panel was on the ground) and never put 2 and 2 together.
Thanks for your help.